v + yesterday
yesterday 作时间副词通常放在句末，表示动作发生在昨天。
I saw him yesterday.
我昨天看见他了。
在昨天
在昨天
On the day before today.
昨天
on the day preceding today
I met an old friend yesterday.
我昨天遇到了一位老朋友。
用法提示：yesterday 作时间副词，说明动作发生在今天的前一天。
AI contextual example
Yesterday, the weather was beautiful.
昨天天气很好。
用法提示：yesterday 置于句首作时间状语，表示“在昨天”。
AI contextual example
He wasn't at school yesterday.
他昨天没在学校。
用法提示：yesterday 作副词修饰整个句子，指出过去时间点。
AI contextual example
yesterday 作时间副词通常放在句末，表示动作发生在昨天。
I saw him yesterday.
我昨天看见他了。
置于句首时，yesterday 后一般加逗号，用于强调时间。
Yesterday, she finished her homework.
昨天，她完成了作业。
yesterday 可直接与 morning, afternoon, evening 等连用，指昨天的某个时段；前面不加 on。
We met yesterday afternoon.
我们昨天下午见了面。
grammar · medium
易错句子I have finished my homework yesterday.
正确表达I finished my homework yesterday.
yesterday 指明确的过去时间，只能和一般过去时连用。现在完成时强调与现在的联系，不能与 yesterday、last week 这类具体过去时间状语搭配；汉语的“已经……了”容易诱使学习者误用完成时。
grammar · medium
易错句子We went swimming on yesterday.
正确表达We went swimming yesterday.
yesterday 是副词，本身就能作时间状语，前面不加介词。汉语说“在昨天”，但英语中没有 on yesterday 或 in yesterday 的说法。
grammar · medium
易错句子I saw a good film yesterday night.
正确表达I saw a good film last night.
英语里“昨天晚上”固定说 last night，不能用 yesterday night。yesterday 只能与 morning、afternoon、evening 等构成 yesterday morning 这样的短语，且短语前不加介词。
昨天早上；昨天上午
I saw her yesterday morning.
我昨天早上见过她。
昨天下午
We had a meeting yesterday afternoon.
我们昨天下午开了个会。
昨天晚上；昨晚
He called me yesterday evening.
他昨天晚上给我打了电话。
前天
They arrived the day before yesterday.
他们前天到的。
就在昨天
I saw him just yesterday.
我就在昨天见过他。
发长 /eɪ/ 音 (如 day, play)
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截至昨天
As of yesterday, the office was still closed.
截至昨天，办公室仍然关着。